Illustrated Companion to the Latin Dictionary/Praeclavium

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

PRAECLA'VIUM. That portion of a piece of cloth intended to be decorated with the purple stripe (clavus), which was woven before or without the stripe (Non. s. v.). It was made of white wool, and when completed the coloured threads were taken up, and woven into the fabric, as is clear from a passage of Afranius (ap. Non. l. c.): — mea nutrix, surge, si vis, profer purpuram, praeclavium textum est.